apsh_envars_get_sample.c

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/*
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 * provided that the following conditions are met:
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 *       provided with the distribution.
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 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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#include <doca_apsh.h>
#include <doca_log.h>
 
#include "apsh_common.h"
 
DOCA_LOG_REGISTER(ENVARS_GET);
 
/*
 * Calls the DOCA APSH API function that matches this sample name and prints the result
 *
 * @dma_device_name [in]: IBDEV Name of the device to use for DMA
 * @pci_vuid [in]: VUID of the device exposed to the target system
 * @pid [in]: PID of the target process
 * @return: DOCA_SUCCESS on success and DOCA_ERROR otherwise
 */
doca_error_t envars_get(const char *dma_device_name,
            const char *pci_vuid,
            DOCA_APSH_PROCESS_PID_TYPE pid,
            const char *mem_region,
            const char *os_symbols)
{
    doca_error_t result;
    int i, nb_processes;
    struct doca_apsh_ctx *apsh_ctx;
    struct doca_apsh_system *sys;
    struct doca_apsh_process *proc, **processes;
    int num_envars;
    struct doca_apsh_envar **envars_list;
 
    /* OS Type: Currently only Windows is supported */
    enum doca_apsh_system_os os_type = DOCA_APSH_SYSTEM_WINDOWS;
 
    /* Init */
    result = init_doca_apsh(dma_device_name, &apsh_ctx);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init the DOCA APSH lib");
        return result;
    }
    DOCA_LOG_INFO("DOCA APSH lib context init successful");
 
    result = init_doca_apsh_system(apsh_ctx, os_type, os_symbols, mem_region, pci_vuid, &sys);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to init the system context");
        return result;
    }
    DOCA_LOG_INFO("DOCA APSH system context created");
 
    result = process_get(pid, sys, &nb_processes, &processes, &proc);
    if (result != DOCA_SUCCESS) {
        if (result == DOCA_ERROR_NOT_FOUND)
            DOCA_LOG_ERR("Process pid %d not found", pid);
        else
            DOCA_LOG_ERR("DOCA APSH encountered an error: %s", doca_error_get_descr(result));
        cleanup_doca_apsh(apsh_ctx, sys);
        return result;
    }
    DOCA_LOG_INFO("Process with PID %d found", pid);
    DOCA_LOG_INFO("Proc(%d) name: %s", pid, doca_apsh_process_info_get(proc, DOCA_APSH_PROCESS_COMM));
 
    result = doca_apsh_envars_get(proc, &envars_list, &num_envars);
    if (result != DOCA_SUCCESS) {
        DOCA_LOG_ERR("Failed to read libs info from host");
        doca_apsh_processes_free(processes);
        cleanup_doca_apsh(apsh_ctx, sys);
        return result;
    }
    DOCA_LOG_INFO("Successfully performed %s. Host proc(%d) contains %d envars", __func__, pid, num_envars);
 
    /* Print some attributes of the envars */
    DOCA_LOG_INFO("Envars for process %d:", pid);
    for (i = 0; i < num_envars; ++i) {
        DOCA_LOG_INFO("\tEnvars %d - variable: %s, value: %s",
                  i,
                  doca_apsh_envar_info_get(envars_list[i], DOCA_APSH_ENVARS_VARIABLE),
                  doca_apsh_envar_info_get(envars_list[i], DOCA_APSH_ENVARS_VALUE));
    }
 
    /* Cleanup */
    doca_apsh_envars_free(envars_list);
    doca_apsh_processes_free(processes);
    cleanup_doca_apsh(apsh_ctx, sys);
    return DOCA_SUCCESS;
}